| Chase H.Q. | Routines |
| Prev: C8BE | Up: Map | Next: CBA4 |
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Used by the routine at main_loop_13.
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| C8E3 | EXX | Bank | ||
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Reset/Update a load of self modified locations.
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| C8E4 | LD A,($C6D9) | Read 'LD A,x' @ C6D8 | ||
| C8E7 | LD ($CB66),A | Self modify 'LD A,x' @ CB65 | ||
| C8EA | LD A,($C6B3) | Read 'LD A,x' @ C6B2 | ||
| C8ED | LD ($CB37),A | Self modify 'LD A,x' @ CB36 | ||
| C8F0 | LD A,($C6D4) | Read 'XOR x' @ C6D3 | ||
| C8F3 | LD ($CB5E),A | Self modify 'XOR x' @ CB5D | ||
| C8F6 | LD A,($C678) | Read 'ADD A,x' @ C677 | ||
| C8F9 | LD ($CA9E),A | Self modify 'ADD A,x' @ CA9D | ||
| C8FC | LD ($CB00),A | Self modify 'ADD A,x' @ CAFF | ||
| C8FF | LD A,($C652) | Read 'ADD A,x' @ C651 | ||
| C902 | LD ($CA7B),A | Self modify 'ADD A,x' @ CA7A | ||
| C905 | LD ($CADD),A | Self modify 'ADD A,x' @ CADC | ||
| C908 | INC A | A++ | ||
| C909 | LD ($CB1D),A | Self modify 'ADD A,x' @ CB1C | ||
| C90C | LD ($CABC),A | Self modify 'ADD A,x' @ CABB | ||
| C90F | LD A,($C6BD) | Read 'LD A,x' @ C6BC | ||
| C912 | LD ($CB41),A | Self modify 'LD A,x' @ CB40 | ||
| C915 | LD A,B | A = B | ||
| C916 | AND A | Set flags | ||
| C917 | JP NZ,$C95A | Jump if non-zero | ||
| C91A | EXX | Unbank | ||
| C91B | LD HL,$C923 | Self modify 'JP NZ' @ CB31 to be C923 | ||
| C91E | LD ($CB32),HL | |||
| C921 | EXX | Bank | ||
| C922 | EX AF,AF' | |||
| C923 | LD A,D | A = (D - 1) & 15 | ||
| C924 | DEC D | |||
| C925 | AND $0F | |||
| C927 | JR Z,$C94C | Jump if zero | ||
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This entry point is used by the routine at C94C.
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| C929 | LD ($C92F),DE | Self modify 'LD DE,x' @ C92E (just below) | ||
| C92D | EXX | Unbank | ||
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Calculate address of next bitmap scanline ??
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| C92E | LD DE,$0000 | DE = <self modified> | ||
| C931 | LD A,E | L = E + 31 | ||
| C932 | ADD A,$1F | |||
| C934 | LD L,A | |||
| C935 | LD H,D | H = D | ||
| C936 | LD SP,HL | Put it in SP (so we can use POP for speed) | ||
| C937 | LD HL,$0000 | HL = 0 [not self modified apparently] | ||
| C93A | LD C,L | C = L | ||
| C93B | JP $CA57 | Jump into a sequence of 15 PUSH HLs | ||
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Smells line scanline counting foo.
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| C93E | LD A,E | E -= 32 | ||
| C93F | SUB $20 | |||
| C941 | LD E,A | |||
| C942 | JP C,$C969 | Jump if E < 32 | ||
| C945 | LD A,D | D -= 16 | ||
| C946 | ADD A,$10 | |||
| C948 | LD D,A | |||
| C949 | JP $C969 | |||
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Smells line scanline counting foo.
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| C94C | LD A,E | E -= 32 | ||
| C94D | SUB $20 | |||
| C94F | LD E,A | |||
| C950 | JP C,$C929 | Jump if E < 32 | ||
| C953 | LD A,D | D -= 16 | ||
| C954 | ADD A,$10 | |||
| C956 | LD D,A | |||
| C957 | JP $C929 | |||
| C95A | EXX | Unbank | ||
| C95B | LD HL,$C963 | Self modify 'JP NZ,x' @ CB31 to be C963 | ||
| C95E | LD ($CB32),HL | |||
| C961 | EXX | |||
| C962 | EX AF,AF' | |||
| C963 | LD A,D | A = D | ||
| C964 | DEC D | D-- | ||
| C965 | AND $0F | A &= $0F | ||
| C967 | JR Z,$C93E | Jump if zero | ||
| C969 | LD ($CA01),DE | Self modify 'LD DE,x' @ CA00 to load current DE | ||
| C96D | LD A,L | A = L | ||
| C96E | EXX | Bank/unbank | ||
| C96F | LD L,A | L = A | ||
| C970 | LD BC,$10F8 | B = 16, C = $F8 (mask) | ||
| C973 | LD H,$E8 | HL = $E8xx | ||
| C975 | LD A,(HL) | A = *HL | ||
| C976 | AND A | Set flags | ||
| C977 | JP Z,$C984 | Jump if zero | ||
| C97A | LD A,$00 | A = 0 (not self modified) | ||
| C97C | JP M,$C993 | Jump if negative | ||
| C97F | LD A,$0F | A = 15 | ||
| C981 | JP $C993 | Jump | ||
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Variation 1?
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| C984 | DEC L | A = HL[-1] | ||
| C985 | LD A,(HL) | |||
| C986 | INC L | |||
| C987 | AND C | A &= C -- C is the mask $F8 here | ||
| C988 | RRCA | A >>= 3 | ||
| C989 | RRCA | |||
| C98A | RRCA | |||
| C98B | RRA | A >>= 1 | ||
| C98C | ADC A,$00 | Add carry | ||
| C98E | CP B | Jump if A < B | ||
| C98F | JP C,$C993 | |||
| C992 | DEC A | A-- | ||
| C993 | LD E,A | E = A | ||
| C994 | CPL | A = ~A | ||
| C995 | ADD A,B | A += B | ||
| C996 | LD ($CA56),A | Self modify 'JR x' @ CA55 -- jump table target | ||
| C999 | INC H | H++ | ||
| C99A | INC H | |||
| C99B | LD A,(HL) | A = *HL | ||
| C99C | AND A | Set flags | ||
| C99D | JP Z,$C9AA | Jump if zero | ||
| C9A0 | LD A,$00 | A = 0 (not self modified) | ||
| C9A2 | JP M,$C9B2 | Jump if negative | ||
| C9A5 | LD A,$0F | A = 15 | ||
| C9A7 | JP $C9B2 | Jump | ||
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Variation 2?
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| C9AA | DEC L | A = HL[-1] | ||
| C9AB | LD A,(HL) | |||
| C9AC | INC L | |||
| C9AD | AND C | A &= C -- C is the mask $F8 here | ||
| C9AE | RRCA | A >>= 3 | ||
| C9AF | RRCA | |||
| C9B0 | RRCA | |||
| C9B1 | RRA | A >>= 1 | ||
| C9B2 | LD D,A | D = A | ||
| C9B3 | SUB E | A = ~(A - E) + B | ||
| C9B4 | CPL | |||
| C9B5 | ADD A,B | |||
| C9B6 | LD ($CA45),A | Self modify jump table target | ||
| C9B9 | INC H | H++ | ||
| C9BA | LD A,(HL) | A = *HL | ||
| C9BB | AND A | Set flags | ||
| C9BC | JP Z,$C9C9 | Jump if zero | ||
| C9BF | LD A,$00 | A = 0 (not self modified) | ||
| C9C1 | JP M,$C9D8 | Jump if negative | ||
| C9C4 | LD A,$0F | A = 15 | ||
| C9C6 | JP $C9D8 | Jump | ||
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Variation 3?
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| C9C9 | DEC L | A = HL[-1] | ||
| C9CA | LD A,(HL) | |||
| C9CB | INC L | |||
| C9CC | AND C | A &= C -- C is the mask $F8 here | ||
| C9CD | RRCA | A >>= 3 | ||
| C9CE | RRCA | |||
| C9CF | RRCA | |||
| C9D0 | RRA | A >>= 1 | ||
| C9D1 | ADC A,$00 | Add carry | ||
| C9D3 | CP B | Jump if A < B | ||
| C9D4 | JP C,$C9D8 | |||
| C9D7 | DEC A | A-- | ||
| C9D8 | LD E,A | E = A | ||
| C9D9 | SUB D | A -= D | ||
| C9DA | CPL | A = ~A | ||
| C9DB | ADD A,B | A += B | ||
| C9DC | LD ($CA34),A | Self modify 'JR x' @ CA33 -- jump table target | ||
| C9DF | INC H | H += 2 | ||
| C9E0 | INC H | |||
| C9E1 | LD A,(HL) | A = *HL | ||
| C9E2 | AND A | Set flags | ||
| C9E3 | JP Z,$C9F0 | Jump if zero | ||
| C9E6 | LD A,$00 | A = 0 (not self modified) | ||
| C9E8 | JP M,$C9F7 | Jump if negative | ||
| C9EB | LD A,$0F | A = 15 | ||
| C9ED | JP $C9F7 | Jump | ||
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Different chunk
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| C9F0 | DEC L | A = HL[-1] | ||
| C9F1 | LD A,(HL) | |||
| C9F2 | AND C | A &= C -- C is the mask $F8 here | ||
| C9F3 | RRCA | A >>= 3 | ||
| C9F4 | RRCA | |||
| C9F5 | RRCA | |||
| C9F6 | RRA | A >>= 1 | ||
| C9F7 | LD ($CA12),A | Self modify 'JR x' @ CA11 -- jump table target | ||
| C9FA | SUB E | A -= E | ||
| C9FB | CPL | A = ~A + B | ||
| C9FC | ADD A,B | |||
| C9FD | LD ($CA23),A | Self modify 'JR x' @ CA22 -- jump table target | ||
| CA00 | LD DE,$0000 | Self modified | ||
| CA03 | LD A,E | A = E + 31 | ||
| CA04 | ADD A,$1F | |||
| CA06 | LD L,A | L = A | ||
| CA07 | LD H,D | H = D | ||
| CA08 | LD SP,HL | Put it in SP (so we can use POP for speed) | ||
| CA09 | EX AF,AF' | Bank A | ||
| CA0A | RLCA | A <<= 1 -- Rotate the road shading pattern (0x55 <-> 0xAA) | ||
| CA0B | LD H,A | H = A -- Prepare pattern for storing | ||
| CA0C | LD L,A | L = A | ||
| CA0D | EX AF,AF' | Unbank A | ||
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This BC filling the blank parts of the road when drawing the split road.
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| CA0E | LD BC,$0000 | BC = 0 [doesn't seem self modified] | ||
| CA11 | JR $CA11 | Jump table (self modified) Write 16 pixels | ||
| CA13 | PUSH HL | |||
| CA14 | PUSH HL | |||
| CA15 | PUSH HL | |||
| CA16 | PUSH HL | |||
| CA17 | PUSH HL | |||
| CA18 | PUSH HL | |||
| CA19 | PUSH HL | |||
| CA1A | PUSH HL | |||
| CA1B | PUSH HL | |||
| CA1C | PUSH HL | |||
| CA1D | PUSH HL | |||
| CA1E | PUSH HL | |||
| CA1F | PUSH HL | |||
| CA20 | PUSH HL | |||
| CA21 | PUSH HL | |||
| CA22 | JR $CA22 | Jump table (self modified) | ||
| CA24 | PUSH BC | |||
| CA25 | PUSH BC | |||
| CA26 | PUSH BC | |||
| CA27 | PUSH BC | |||
| CA28 | PUSH BC | |||
| CA29 | PUSH BC | |||
| CA2A | PUSH BC | |||
| CA2B | PUSH BC | |||
| CA2C | PUSH BC | |||
| CA2D | PUSH BC | |||
| CA2E | PUSH BC | |||
| CA2F | PUSH BC | |||
| CA30 | PUSH BC | |||
| CA31 | PUSH BC | |||
| CA32 | PUSH BC | |||
| CA33 | JR $CA33 | Jump table (self modified) | ||
| CA35 | PUSH HL | |||
| CA36 | PUSH HL | |||
| CA37 | PUSH HL | |||
| CA38 | PUSH HL | |||
| CA39 | PUSH HL | |||
| CA3A | PUSH HL | |||
| CA3B | PUSH HL | |||
| CA3C | PUSH HL | |||
| CA3D | PUSH HL | |||
| CA3E | PUSH HL | |||
| CA3F | PUSH HL | |||
| CA40 | PUSH HL | |||
| CA41 | PUSH HL | |||
| CA42 | PUSH HL | |||
| CA43 | PUSH HL | |||
| CA44 | JR $CA44 | Jump table (self modified) | ||
| CA46 | PUSH BC | |||
| CA47 | PUSH BC | |||
| CA48 | PUSH BC | |||
| CA49 | PUSH BC | |||
| CA4A | PUSH BC | |||
| CA4B | PUSH BC | |||
| CA4C | PUSH BC | |||
| CA4D | PUSH BC | |||
| CA4E | PUSH BC | |||
| CA4F | PUSH BC | |||
| CA50 | PUSH BC | |||
| CA51 | PUSH BC | |||
| CA52 | PUSH BC | |||
| CA53 | PUSH BC | |||
| CA54 | PUSH BC | |||
| CA55 | JR $CA55 | Jump table (self modified) | ||
| CA57 | PUSH HL | |||
| CA58 | PUSH HL | |||
| CA59 | PUSH HL | |||
| CA5A | PUSH HL | |||
| CA5B | PUSH HL | |||
| CA5C | PUSH HL | |||
| CA5D | PUSH HL | |||
| CA5E | PUSH HL | |||
| CA5F | PUSH HL | |||
| CA60 | PUSH HL | |||
| CA61 | PUSH HL | |||
| CA62 | PUSH HL | |||
| CA63 | PUSH HL | |||
| CA64 | PUSH HL | |||
| CA65 | PUSH HL | |||
| CA66 | LD B,E | B = E | ||
| CA67 | DEC C | C-- | ||
| CA68 | LD H,$E4 | H = $E4 | ||
| CA6A | EXX | Bank/unbank | ||
| CA6B | LD H,$E8 | H = $E8 | ||
| CA6D | LD A,(HL) | A = *HL | ||
| CA6E | AND A | Set flags | ||
| CA6F | JR NZ,$CA90 | Jump if non-zero | ||
| CA71 | DEC L | A = HL[-1] | ||
| CA72 | LD A,(HL) | |||
| CA73 | INC L | |||
| CA74 | EXX | Bank/unbank | ||
| CA75 | LD E,A | E = A | ||
| CA76 | AND $07 | A &= 7 | ||
| CA78 | RLCA | A = A ROL 2 | ||
| CA79 | RLCA | |||
| CA7A | ADD A,$00 | A += <self modified> | ||
| CA7C | LD L,A | L = A | ||
| CA7D | LD A,E | A = E | ||
| CA7E | RRA | A = A (rotate right through carry) 3 | ||
| CA7F | RRA | |||
| CA80 | RRA | |||
| CA81 | AND $1F | A = (A & 31) + B | ||
| CA83 | ADD A,B | |||
| CA84 | LD E,A | E = A | ||
| CA85 | LD A,(DE) | A = *DE | ||
| CA86 | AND (HL) | A = A & *HL | ||
| CA87 | INC L | L++ | ||
| CA88 | OR (HL) | A |= *HL | ||
| CA89 | LD (DE),A | *DE = A | ||
| CA8A | INC L | L += 2 | ||
| CA8B | INC L | |||
| CA8C | INC E | E++ | ||
| CA8D | LDI | *DE++ = *HL++, BC-- | ||
| CA8F | EXX | Bank/unbank | ||
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Similar chunk to above
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| CA90 | INC H | H++ | ||
| CA91 | LD A,(HL) | A = *HL | ||
| CA92 | AND A | Set flags | ||
| CA93 | JR NZ,$CAAD | Jump if non-zero | ||
| CA95 | DEC L | A = HL[-1] | ||
| CA96 | LD A,(HL) | |||
| CA97 | INC L | |||
| CA98 | EXX | Bank/unbank | ||
| CA99 | LD E,A | E = A | ||
| CA9A | AND $07 | A &= 7 | ||
| CA9C | RLCA | A = A ROL 1 | ||
| CA9D | ADD A,$00 | A += <self modified> | ||
| CA9F | LD L,A | L = A | ||
| CAA0 | LD A,E | A = E | ||
| CAA1 | RRA | A = A (rotate right through carry) 3 | ||
| CAA2 | RRA | |||
| CAA3 | RRA | |||
| CAA4 | AND $1F | A = (A & 31) + B | ||
| CAA6 | ADD A,B | |||
| CAA7 | LD E,A | E = A | ||
| CAA8 | LDI | *DE++ = *HL++, BC-- | ||
| CAAA | LD A,(HL) | A = *HL | ||
| CAAB | LD (DE),A | *DE = A | ||
| CAAC | EXX | Bank/unbank | ||
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Similar chunk again to above... different rotates
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| CAAD | INC H | H++ | ||
| CAAE | LD A,(HL) | A = *HL | ||
| CAAF | AND A | Set flags | ||
| CAB0 | JR NZ,$CACE | Jump if non-zero | ||
| CAB2 | DEC L | A = HL[-1] | ||
| CAB3 | LD A,(HL) | |||
| CAB4 | INC L | |||
| CAB5 | EXX | Bank/unbank | ||
| CAB6 | LD E,A | E = A | ||
| CAB7 | AND $07 | A &= 7 | ||
| CAB9 | RLCA | A = A ROL 2 | ||
| CABA | RLCA | |||
| CABB | ADD A,$11 | A += <self modified> | ||
| CABD | LD L,A | L = A | ||
| CABE | LD A,E | A = E | ||
| CABF | RRA | A = A (rotate right through carry) 3 | ||
| CAC0 | RRA | |||
| CAC1 | RRA | |||
| CAC2 | AND $1F | A = (A & 31) + B | ||
| CAC4 | ADD A,B | |||
| CAC5 | LD E,A | E = A | ||
| CAC6 | LDI | *DE++ = *HL++, BC-- | ||
| CAC8 | LD A,(DE) | A = *DE & *HL | ||
| CAC9 | AND (HL) | |||
| CACA | INC L | L++ | ||
| CACB | OR (HL) | A |= *HL | ||
| CACC | LD (DE),A | *DE = A | ||
| CACD | EXX | Bank/unbank | ||
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Similar chunk again
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| CACE | INC H | H++ | ||
| CACF | LD A,(HL) | A = *HL | ||
| CAD0 | AND A | Set flags | ||
| CAD1 | JR NZ,$CAF2 | Jump if non-zero | ||
| CAD3 | DEC L | A = HL[-1] | ||
| CAD4 | LD A,(HL) | |||
| CAD5 | INC L | |||
| CAD6 | EXX | Bank/unbank | ||
| CAD7 | LD E,A | E = A | ||
| CAD8 | AND $07 | A &= 7 | ||
| CADA | RLCA | A = A ROL 2 | ||
| CADB | RLCA | |||
| CADC | ADD A,$00 | A += <self modified> | ||
| CADE | LD L,A | L = A | ||
| CADF | LD A,E | A = E | ||
| CAE0 | RRA | A = A (rotate right through carry) 3 | ||
| CAE1 | RRA | |||
| CAE2 | RRA | |||
| CAE3 | AND $1F | A = (A & 31) + B | ||
| CAE5 | ADD A,B | |||
| CAE6 | LD E,A | E = A | ||
| CAE7 | LD A,(DE) | A = *DE & *HL | ||
| CAE8 | AND (HL) | |||
| CAE9 | INC L | L++ | ||
| CAEA | OR (HL) | A |= *HL | ||
| CAEB | LD (DE),A | *DE = A | ||
| CAEC | INC L | L += 2 | ||
| CAED | INC L | |||
| CAEE | INC E | E++ | ||
| CAEF | LDI | *DE++ = *HL++, BC-- | ||
| CAF1 | EXX | Bank/unbank | ||
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Similar chunk again
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| CAF2 | INC H | H++ | ||
| CAF3 | LD A,(HL) | A = *HL | ||
| CAF4 | AND A | Set flags | ||
| CAF5 | JR NZ,$CB0F | Jump if non-zero | ||
| CAF7 | DEC L | A = HL[-1] | ||
| CAF8 | LD A,(HL) | |||
| CAF9 | INC L | |||
| CAFA | EXX | Bank/unbank | ||
| CAFB | LD E,A | E = A | ||
| CAFC | AND $07 | A &= 7 | ||
| CAFE | RLCA | A = A ROL 1 | ||
| CAFF | ADD A,$00 | A += <self modified> | ||
| CB01 | LD L,A | L = A | ||
| CB02 | LD A,E | A = E | ||
| CB03 | RRA | A >>= 3 | ||
| CB04 | RRA | |||
| CB05 | RRA | |||
| CB06 | AND $1F | A &= $1F | ||
| CB08 | ADD A,B | A += B | ||
| CB09 | LD E,A | E = A | ||
| CB0A | LDI | |||
| CB0C | LD A,(HL) | A = *HL | ||
| CB0D | LD (DE),A | *DE = A | ||
| CB0E | EXX | Bank/unbank | ||
| CB0F | INC H | A = HL[-1] | ||
| CB10 | LD A,(HL) | |||
| CB11 | DEC L | |||
| CB12 | AND A | Set flags | ||
| CB13 | JR NZ,$CB2F | Jump if non-zero | ||
| CB15 | LD A,(HL) | A = *HL | ||
| CB16 | EXX | Bank/unbank | ||
| CB17 | LD E,A | E = A | ||
| CB18 | AND $07 | A &= 7 | ||
| CB1A | RLCA | A <<= 2 | ||
| CB1B | RLCA | |||
| CB1C | ADD A,$11 | A += 17 | ||
| CB1E | LD L,A | L = A | ||
| CB1F | LD A,E | A = E | ||
| CB20 | RRA | A = A (rotate right through carry) 3 | ||
| CB21 | RRA | |||
| CB22 | RRA | |||
| CB23 | AND $1F | A = (A & 31) + B | ||
| CB25 | ADD A,B | |||
| CB26 | LD E,A | E = A | ||
| CB27 | LDI | *DE++ = *HL++, BC-- | ||
| CB29 | LD A,(DE) | A = *DE | ||
| CB2A | AND (HL) | A &= *HL [AND-OR masking?] | ||
| CB2B | INC L | L++ | ||
| CB2C | OR (HL) | A |= *HL | ||
| CB2D | LD (DE),A | *DE = A | ||
| CB2E | EXX | Bank/unbank | ||
| CB2F | DEC L | L-- | ||
| CB30 | DEC C | C-- | ||
| CB31 | JP NZ,$0000 | Jump if non-zero to <self modified> | ||
| CB34 | EX AF,AF' | |||
| CB35 | LD B,A | B = A | ||
| CB36 | LD A,$00 | A = <self modified> | ||
| CB38 | XOR $01 | Toggle bit 0 | ||
| CB3A | LD ($CB37),A | Self modify 'LD A,x' @ CB36 (just above) | ||
| CB3D | JP NZ,$CB65 | Jump if non-zero | ||
| CB40 | LD A,$00 | A = <self modified> | ||
| CB42 | XOR $55 | Toggle every other bit | ||
| CB44 | LD ($CB41),A | Self modify 'LD A,x' @ CB40 (just above) | ||
| CB47 | LD B,A | B = A | ||
| CB48 | LD A,($CA7B) | Self modify 'LD A,x' @ CA7A | ||
| CB4B | XOR $20 | |||
| CB4D | LD ($CA7B),A | |||
| CB50 | LD ($CADD),A | Self modify 'ADD A,x' @ CADC | ||
| CB53 | INC A | A++ | ||
| CB54 | LD ($CB1D),A | Self modify 'ADD A,x' @ CB1C | ||
| CB57 | LD ($CABC),A | Self modify 'ADD A,x' @ CABB | ||
| CB5A | LD A,($CA9E) | Read 'LD A,x' @ CA9D | ||
| CB5D | XOR $00 | [nested self modification - INCEPTION ACHIEVED] | ||
| CB5F | LD ($CA9E),A | Self modify 'LD A,x' @ CA9D | ||
| CB62 | LD ($CB00),A | Self modify 'ADD A,x' @ CAFF | ||
| CB65 | LD A,$00 | A = <self modified> - 1 | ||
| CB67 | DEC A | |||
| CB68 | LD ($CB66),A | Self modify 'LD A,x' @ CB65 | ||
| CB6B | JP NZ,$CB90 | |||
| CB6E | LD A,($CB5E) | Self modify 'XOR x' @ CB5D | ||
| CB71 | ADD A,$10 | |||
| CB73 | JR C,$CB90 | |||
| CB75 | LD ($CB5E),A | |||
| CB78 | LD C,A | C = A | ||
| CB79 | LD A,($CA9E) | self modified chunk Set flags Jump if zero A = C | ||
| CB7C | AND A | |||
| CB7D | JR Z,$CB83 | |||
| CB7F | LD A,C | |||
| CB80 | LD ($CA9E),A | |||
| CB83 | LD A,($CA7B) | Self modify 'LD A,x' @ CA7A | ||
| CB86 | ADD A,$40 | |||
| CB88 | LD ($CA7B),A | |||
| CB8B | LD A,$05 | Self modify 'LD A,x' @ CB65 to load 5 | ||
| CB8D | LD ($CB66),A | |||
| CB90 | LD A,(IY+$00) | A = IY[0] | ||
| CB93 | INC IY | IY++ | ||
| CB95 | INC IXl | IX.low++ | ||
| CB97 | SUB (IY+$00) | A -= IY[0] | ||
| CB9A | JR Z,$CB9F | Jump if zero | ||
| CB9C | JP P,$CBC5 | Jump if positive | ||
| CB9F | DEC L | L -= 2 | ||
| CBA0 | DEC L | |||
| CBA1 | JP $CB36 | Loop | ||
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